教師資料查詢 | 類別: 期刊論文 | 教師: 張經霖 CHANG, HENRY CHING-LIN (瀏覽個人網頁)

標題:Disorder-induced Room Temperature Ferromagnetism in Glassy Chromites
學年
學期
出版(發表)日期2014/01/01
作品名稱Disorder-induced Room Temperature Ferromagnetism in Glassy Chromites
作品名稱(其他語言)
著者Moyses Araujo; Sandeep Nagar; Muhammad Ramzan; R. Shukla; O. D. Jayakumar; A. K. Tyagi; Liu, Yi-Sheng; Chen, Jeng-Lung; Per-Anders Glans; Chang, Chinglin 張經霖; Andreas Blomqvist; Raquel Lizárraga; Erik Holmström; Lyubov Belova; Guo, Jinghua; Rajeev Ahuja; K. V. Rao
單位淡江大學物理學系
出版者London: Nature Publishing Group
著錄名稱、卷期、頁數Scientific Reports 4, 4686
摘要We report an unusual robust ferromagnetic order above room temperature upon amorphization of perovskite [YCrO3] in pulsed laser deposited thin films. This is contrary to the usual expected formation of a spin glass magnetic state in the resulting disordered structure. To understand the underlying physics of this phenomenon, we combine advanced spectroscopic techniques and first-principles calculations. We find that the observed order-disorder transformation is accompanied by an insulator-metal transition arising from a wide distribution of Cr-O-Cr bond angles and the consequent metallization through free carriers. Similar results also found in YbCrO3-films suggest that the observed phenomenon is more general and should, in principle, apply to a wider range of oxide systems. The ability to tailor ferromagnetic order above room temperature in oxide materials opens up many possibilities for novel technological applications of this counter intuitive effect.
關鍵字
語言英文
ISSN2045-2322
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別英國
公開徵稿
出版型式電子版
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